In general, the two main types are hierarchical and non-hierarchical. Therefore each worker/group of workers must report to or take commands from a single person; also called command unit. Workers are usually divided into different sections, depending on their role. Matrix structures are the most common type. They are more flexible and cause workers to report to two people, usually a functional manager and a product manager. This means that if a boss is busy/away, they can still get answers/feedback easily. Matrix structure of an engineering organization, divided into projects rather than individual workers. Where the lines intersect (indicated by circles) there would be (groups of) employees and the lines would determine who to report